Power BI Report Server: You are not allowed to view this folder for System Administrator

We are trying to install a fresh version of Power BI Report Server at a client. The local account used to access the Report server is System Administrator on the box as well as on the Report server System level security (under site setting).

We cannot even see the New, Upload, Manage Folder buttons ... On other posts I have seen that the Sys Admin also needs to be a Content Manager. But I am not sure how to do that when I dont see "Manage Folder" button.

Any suggestion how to figure out which user would have access to get this working (The server was installed in tandem with client DBA who had access to create Report server databases - i would not want to bother him unless absolutely required).